Brief History: For many years Azazel has been preparing and building an army for the
coming war between Good and Evil. He has been locating children with special abilities
and giving them a sort of dark baptism with his own blood. Sam
is one of these children and on the night he went to baptise him, Azazel killed
Sam's mother, Mary Winchester.

Ever since that night, John Winchester has made it his
mission to the point of obsession to destroy Azazel. Azazel send his daughter in
the body of Meg Masters to locate and track
the Winchesters in order to obtain the Colt from them, finish his job with
Sam and kill both John
and Dean.